- All sections
- E - Fixed constructions
- E21B - Earth or rock drillingobtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B 10/28 - Drill bits with leading portion, i.e. drill bits with a pilot cutterDrill bits for enlarging the borehole, e.g. reamers with non-expansible roller cutters
Patent holdings for IPC class E21B 10/28
Total number of patents in this class: 84
10-year publication summary
|
12
|
8
|
11
|
5
|
5
|
4
|
3
|
9
|
2
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Baker Hughes Holdings LLC | 3001 |
8 |
| Optionx Holdings Pty Ltd | 11 |
8 |
| Dynomax Drilling Tools Inc. | 18 |
5 |
| Sandvik Intellectual Property AB | 1475 |
5 |
| Herrenknecht AG | 203 |
4 |
| Quanta Associates, L.P. | 432 |
4 |
| Sandvik Mining and Construction Tools AB | 173 |
4 |
| Master Sinkers (Pty) Ltd | 7 |
4 |
| Halliburton Energy Services, Inc. | 20946 |
3 |
| Smith International, Inc. | 718 |
3 |
| Bit Brokers International LTD | 6 |
3 |
| Shear Bits, Ltd. | 12 |
3 |
| Hard Rock Horizontal Directional Drilling Products, Inc. | 6 |
3 |
| Barbco, Inc. | 13 |
2 |
| Century Products, Inc. | 28 |
2 |
| The Charles Machine Works, Inc. | 404 |
2 |
| Southeast Directional Drilling, LLC | 12 |
2 |
| Hole Opener Corporation International | 6 |
2 |
| Shear Bits, Inc. | 10 |
2 |
| Baker Hughes Incorporated | 5248 |
1 |
| Other owners | 14 |